Guarantee correct order of domain events for remote projections

[alexlawrence]

http://stackoverflow.com/questions/15410267/does-socket-io-garantee-that-broadcasted-events-are-received-in-order-client-sid

[alexlawrence]

Issue #42. That has to be a sign.

[medialwerk]

We could throw an error if the domain event order is not correct. So we can find out if this problem is theoretical or practical.